Chemical News and Journal of Industrial Science, Tomy 127-128Chemical news office., 1923 |
Z wnętrza książki
Wyniki 1 - 5 z 25
Strona 33
... thorium , on the other hand , is much less conspicuous . The most typical thorium minerals , such as orangite , thorite , and thorianite , were found to be free from hafnium . The above conclusions , drawn from geo- chemical data , were ...
... thorium , on the other hand , is much less conspicuous . The most typical thorium minerals , such as orangite , thorite , and thorianite , were found to be free from hafnium . The above conclusions , drawn from geo- chemical data , were ...
Strona 92
... thorium and the thirty - four , as we now know , suc- cessive unstable products of their spontane- ous disintegration . Each of these possesses a definite radioactive character ; it is pro- duced from one and changes into another ...
... thorium and the thirty - four , as we now know , suc- cessive unstable products of their spontane- ous disintegration . Each of these possesses a definite radioactive character ; it is pro- duced from one and changes into another ...
Strona 93
... thorium . But there are not thirty - four vacant places in the Periodic Table to accommodate them . META - ELEMENTS ... thorium is continuously producing a radioactive substance , thorium X , separable from it by precipitation with ...
... thorium . But there are not thirty - four vacant places in the Periodic Table to accommodate them . META - ELEMENTS ... thorium is continuously producing a radioactive substance , thorium X , separable from it by precipitation with ...
Strona 94
... thorium series now runs * : - a Thorium Mesothorium 1- → 2.1010 years 9.67 years β Mesothorium 2- 8.9 hours Radiothorium- 2.91 years a а Thorium X- → 5.25 days a . Emanation - etc . 78 seconds In this series thorium and radiothorium ...
... thorium series now runs * : - a Thorium Mesothorium 1- → 2.1010 years 9.67 years β Mesothorium 2- 8.9 hours Radiothorium- 2.91 years a а Thorium X- → 5.25 days a . Emanation - etc . 78 seconds In this series thorium and radiothorium ...
Strona 95
... thorium . Keet- man , who with Marckwald discovered ionium independently , tried twelve good methods , all known to be effective , in the purification of thorium in the attempt to separate the ionium from thorium , com- pletely without ...
... thorium . Keet- man , who with Marckwald discovered ionium independently , tried twelve good methods , all known to be effective , in the purification of thorium in the attempt to separate the ionium from thorium , com- pletely without ...
Inne wydania - Wyświetl wszystko
Kluczowe wyrazy i wyrażenia
acid action addition alcohol amount ANALYTICAL BALANCE appears application arsenic Association atom British carbon carbon tetrachloride carried cent charge chemical Chemistry chloride College colour complete compounds concentrate containing course crystals derivatives determined dyes effect electric electrons elements energy examination exist experiments fact frequency further give given glass heat hydrogen important increase industry Institute interest known laboratory lead less light lines London manufacture mass material matter means ment mercury metal method molecule nature nucleus observed obtained organic oxide period phase physical position possible practical precipitated prepared present properties Published pure quantum radiation reaction regarded relation Research rubber salts separated shown sodium solution spectrum structure sulphuric temperature term theory tion Trade United various weight